Yep, in Texas growing up we heard them as a kid all the time but they were always pretty high up. In the 80’s, Dad and I had a dear lease in the Big Bend region of Texas. Traveling from Abilene, we went trough some remote areas. On several occasions south of San Angelo, we encounter some F4 Phantoms on low level training runs. The were not super sonic but the would scare the crap out of you when they flew over at low level. I don’t remember how low they were but you could not see them coming for the trees. My former brother in law flew in the gulf war after hostilities had ceased. They got intel that Saddam was having a victory party some where with his troops and equipment in a big gathering. His group of F111 flew over Mach 1 pluse at 500 feet. He said at that level it would really tear up some stuff. They never saw them coming to hide!